fix: avoid invented compaction constraints

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/compaction-context-injector/index.test.ts

@@ -56,4 +56,17 @@ describe("createCompactionContextInjector", () => {
       expect(prompt).toContain("Files already verified")
     })
   })
+
+  it("restricts constraints to explicit verbatim statements", async () => {
+    //#given
+    const injector = createCompactionContextInjector()
+
+    //#when
+    const prompt = injector()
+
+    //#then
+    expect(prompt).toContain("Explicit Constraints (Verbatim Only)")
+    expect(prompt).toContain("Do NOT invent")
+    expect(prompt).toContain("Quote constraints verbatim")
+  })
 })

src/hooks/compaction-context-injector/index.ts

@@ -29,11 +29,11 @@ When summarizing this session, you MUST include the following sections in your s
 - **External References**: Documentation URLs, library APIs, or external resources being consulted
 - **State & Variables**: Important variable names, configuration values, or runtime state relevant to ongoing work
 
-## 6. MUST NOT Do (Critical Constraints)
-- Things that were explicitly forbidden
-- Approaches that failed and should not be retried
-- User's explicit restrictions or preferences
-- Anti-patterns identified during the session
+## 6. Explicit Constraints (Verbatim Only)
+- Include ONLY constraints explicitly stated by the user or in existing AGENTS.md context
+- Quote constraints verbatim (do not paraphrase)
+- Do NOT invent, add, or modify constraints
+- If no explicit constraints exist, write "None"
 
 ## 7. Agent Verification State (Critical for Reviewers)
 - **Current Agent**: What agent is running (momus, oracle, etc.)